Analysis of Residual Magnetism Suppression and Output Characteristics on Pulse Transformer Based on Core Reset

ZHI Yuting; ZHANG Jiaxing; WEI Biyang; QIU Li; FANG Chunhua; JIANG Jinbo

doi:10.13296/j.1001-1609.hva.2026.04.006

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Analysis of Residual Magnetism Suppression and Output Characteristics on Pulse Transformer Based on Core Reset

Research & Analysis | 更新时间：2026-04-08

- Analysis of Residual Magnetism Suppression and Output Characteristics on Pulse Transformer Based on Core Reset
- High Voltage Apparatus Vol. 62, Issue 4, Pages: 56-65(2026)
- 作者机构：
  
  三峡大学电气与新能源学院，湖北宜昌 443002
  国网河南省电力公司三门峡供电公司，河南三门峡 472000
  三峡大学湖北省输电线路工程技术研究中心，湖北宜昌 443002
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51707105)
- DOI：10.13296/j.1001-1609.hva.2026.04.006
  CLC：
- Received：20 September 2025，
  
  Revised：2025-12-07，
  
  Published：16 April 2026
- 稿件说明：
移动端阅览
ZHI Yuting, ZHANG Jiaxing, WEI Biyang, et al. Analysis of Residual Magnetism Suppression and Output Characteristics on Pulse Transformer Based on Core Reset[J]. High Voltage Apparatus, 2026, 62(4): 56-65.
DOI：

ZHI Yuting, ZHANG Jiaxing, WEI Biyang, et al. Analysis of Residual Magnetism Suppression and Output Characteristics on Pulse Transformer Based on Core Reset[J]. High Voltage Apparatus, 2026, 62(4): 56-65. DOI： 10.13296/j.1001-1609.hva.2026.04.006.

摘要

脉冲变压器广泛应用于气体开关触发器，磁芯剩磁导致触发器在重频运行时输出波形的一致性不高，使气体开关导通时延和抖动发生变化。磁芯复位是消除剩磁影响的有效方法，目前研究多基于经验公式估算复位电流，存在复位时间长、精度不足的问题。通过测试磁芯的脉冲磁化特性，建立了基于磁芯非线性的脉冲变压器场路耦合模型，分析剩磁与复位过程对输出特性的影响，并对复位电流大小、隔离电感及旁路电容等关键参数进行了仿真优化。针对20 kV级气体开关触发器，依据优化的磁芯复位电路，测试其重频工况下的输出性能。实验结果表明，设计的直流复位电路可以隔离脉冲高压，提高磁芯利用率，脉冲输出波形的平均幅值为19.88 kV，离散系数为0.08%，脉冲前沿平均值为3.32 μs，离散系数为0.42%，脉宽平均值为3.77 μs，离散系数为0.21%，波形的一致性较高。

Abstract

Pulse transformers are widely used in gas switch triggers. Residual magnetism in the magnetic core leads to weak consistency of the output waveforms during repretitive frequency operation

causing variations in the conduction delay and jitter of the gas switch. Magnetic core reset is an effective method for eliminating the influence of residual magnetism. The current research is primarily based on empirical formulas to estimate the reset current

resulting in such problems as long resetting time and insufficient accuracy. By testing the pulse magnetization characteristics of the magnetic core

a field-circuit coupling model of the pulse transformer based on core nonlinearity is set up. The effects of remanence and reset processes on the output characteristics are analyzed

and such key parameters as reset current

isolation inductance and bypass capacitance are simulated and optimized. For 20 kV-class gas switch triggers

its output performance under repeated-frequency conditions is tested in accordance with the optimized magnetic core reset circuit. The experimental results show that the designed DC reset circuit can effectively isolate high-voltage pulses and enhances core utilization rate. The average amplitude of the pulse output waveform is 19.88 kV

with a coefficient of variation of 0.08%. The average pulse rise time is 3.32 μs

with a coefficient of variation of 0.42%. The average pulse width is 3.77 μs

with a coefficient of variation of 0.21%. The waveform exhibits high consistency.

关键词

Keywords

references

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